[1]孫志和  朱克華  劉超  寧軍  孫天宇  邵帥  付君豪.繩索取心技術在煤層氣DP1 井的應用[J].石油鉆采工藝,2018,40(6):716-719.[doi:10.13639/j.odpt.2018.06.008]
 SUN Zhihe,ZHU Kehua,LIU Chao,et al.Application of wireline coring technology in coalbed methane well DP1[J].Oil Drilling & Production Technology,2018,40(6):716-719.[doi:10.13639/j.odpt.2018.06.008]
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繩索取心技術在煤層氣DP1 井的應用
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《石油鉆采工藝》[ISSN:1000-7393/CN:13-1072/TE]

卷:
40卷
期數:
2018年6期
頁碼:
716-719
欄目:
鉆井完井
出版日期:
2018-11-20

文章信息/Info

Title:
Application of wireline coring technology in coalbed methane well DP1
文章編號:
1000 – 7393( 2018 )06 – 0716– 04
作者:
孫志和1  朱克華1  劉超2  寧軍2  孫天宇3  邵帥4  付君豪3
1. 中國石油華北油田公司;2. 渤海鉆探第四鉆井工程公司;3. 渤海鉆探第五鉆井工程公司;4. 渤海鉆探定向井公司
Author(s):
SUN Zhihe1 ZHU Kehua1 LIU Chao2 NING Jun2 SUN Tianyu3 SHAO Shuai4 FU Junhao3
1. CNPC Huabei Oilfield Company, Renqiu 062552, Hebei, China; 2. No.4 Drilling Engineering Company, CNPC Bohai Drilling Engineering Company Limited, Renqiu 062552, Hebei, China; 3. No.5 Drilling Engineering Company, CNPC Bohai Drilling Engineering Company Limited, Hejian 062465, Hebei, China; 4. Directional Drilling Service Company, CNPC Bohai Drilling Engineering Company Limited, Tianjin 300280, China
關鍵詞:
煤層氣井繩索取心鉆頭巖心爪巖心收獲率
Keywords:
coalbed methane well wireline coring drilling bit core catcher core recovery
分類號:
TE244
DOI:
10.13639/j.odpt.2018.06.008
文獻標志碼:
B
摘要:
煤層氣井煤層段采用繩索取心技術,具有不用起下鉆而由鉆桿內撈取巖心的技術優勢,但常規繩索取心工具存在取心收獲率低的問題。對繩索取心工具的鉆頭和巖心爪進行改進,將鉆頭改為梭形,頂部改為非連續環,齒間開水槽,將八刀翼4 復合片改為六刀翼6 復合片結構,增強攻擊性,同時去除內圓水眼,減少對巖心的沖蝕;將巖心爪改為卡箍式和籃爪式二合一結構,提高了巖心爪的通用性。配合鉆井參數的優化,使在煤層氣井DP1 井取心施工中收獲率提高到75.68%,為準確獲取煤層頂底板情況及煤層含氣的各項參數起到重要作用。
Abstract:
The wireline coring technology applied in the coal seam section of coalbed methane well technically has the advantage of taking cores inside the drilling pipe without making a trip, but the conventional wireline coring tool is faced with the problem of low core recovery. Drilling bit and core catcher of the wireline coring tool were improved. The drilling bit was reconstructed into a shuttle shape, the top was modified into a discontinuous ring, a water channel was set between teeth, and the structure of 8 blades and 4 composite blocks was changed into that of 6 blades and 6 composite blocks to strengthen its aggression. In addition, the inner nozzle was removed to decrease the erosion on cores. The core catcher was improved into the two-in-one structure of slip collar and basket claw to enhance its universality. And combined with the optimization of drilling parameters, the core recovery is increased to 75.68%. In the process of coring construction in coalbed methane well DP1, the research results play an import role in accurately understanding the situations of roofs and floors and acquiring the gas bearing parameters of coal seams.

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